9781590074497 | details &amp prices | 7.25 × 4.50 × 1.50 in. | 0.25 lbs | List price $21.95About: Based on a series of lectures given at Cambridge University, Professor Hawking's work introduced the history of ideas about the universe as well as today's most important scientific theories about time, space, and the cosmos in a clear, easy-to-understand way.